Abstract
The effect of systematic Zr additions on the corrosion behavior of Ti was studied in both acidic and Reactive Oxygen Species (ROS) containing environments, including macrophage cell culture, simulating inflammation associated with metallic implants. Electrochemical measurements on commercially-pure (CP) Ti, Zr and TiZr alloys showed that increasing Zr additions progressively enhanced Ti passivity in both acidic (HCl) and oxidative (H2O2) environments. However, a Ti50Zr alloy was found with increased pitting susceptibility.
Corrosion was also evaluated using mass-spectrometry to determine metal ion release following exposure of the alloys to THP-1 macrophage cell cultures, transformed into either their M1 (inflammatory states) or M2a (tissue repair states) phenotypes. The magnitude of ion release was reduced with increasing Zr contents, consistent with electrochemical observations. Nevertheless, optimized Zr content in Ti should balance both passivity and pitting resistance.
Corrosion was also evaluated using mass-spectrometry to determine metal ion release following exposure of the alloys to THP-1 macrophage cell cultures, transformed into either their M1 (inflammatory states) or M2a (tissue repair states) phenotypes. The magnitude of ion release was reduced with increasing Zr contents, consistent with electrochemical observations. Nevertheless, optimized Zr content in Ti should balance both passivity and pitting resistance.
Original language | English |
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Pages (from-to) | 1103-1111 |
Number of pages | 9 |
Journal | ACS Biomaterials Science and Engineering |
Volume | 4 |
Issue number | 3 |
Early online date | 19 Feb 2018 |
DOIs | |
Publication status | Published - 12 Mar 2018 |
Bibliographical note
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Biomaterials Science and Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acsbiomaterials.7b00882Keywords
- Biomaterials
- Reactive Oxygen Species
- Macrophages
- Titanium
- zirconium alloy
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Bernard Burke
- Centre for Health and Life Sciences - Associate Professor Research
Person: Teaching and Research